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Contents
# frozen-string-literal: true
module Sequel
module Plugins
# The subset_conditions plugin creates an additional *_conditions method
# for every subset created, which returns the filter conditions the subset
# uses. This can be useful if you want to use the conditions for a separate
# filter or combine them with OR.
#
# Usage:
#
# # Add subset_conditions in the Album class
# Album.plugin :subset_conditions
#
# # This will now create a published_conditions method
# Album.subset :published, :published => true
#
# Album.where(Album.published_conditions).sql
# # SELECT * FROM albums WHERE (published IS TRUE)
#
# Album.exclude(Album.published_conditions).sql
# # SELECT * FROM albums WHERE (published IS NOT TRUE)
#
# Album.where(Sequel.|(Album.published_conditions, :ready=>true)).sql
# # SELECT * FROM albums WHERE ((published IS TRUE) OR (ready IS TRUE))
module SubsetConditions
module ClassMethods
# Also create a method that returns the conditions the filter uses.
def subset(name, *args, &block)
super
cond = args
cond = cond.first if cond.size == 1
def_dataset_method(:"#{name}_conditions"){filter_expr(cond, &block)}
end
end
end
end
end
Version data entries
21 entries across 20 versions & 2 rubygems